技術原理：三氧化二鋁（Al₂O₃）是什麼？ Technical Principle: What is Aluminum Oxide (Al₂O₃)?
AlOx（Aluminum Oxide，三氧化二鋁，化學式 Al₂O₃）是一種無機陶瓷材料，廣泛應用於精密陶瓷、半導體與薄膜阻隔技術。與金屬鋁（Metallic Aluminium）不同，Al₂O₃ 不具導電性，也不會觸發金屬探測器——這是其在食品包裝領域最關鍵的特性。 AlOx (Aluminum Oxide, Al₂O₃) is an inorganic ceramic material widely used in precision ceramics, semiconductors, and thin-film barrier technology. Unlike metallic aluminium, Al₂O₃ is non-conductive and does not trigger metal detectors — its most critical advantage for food packaging applications.
PVD 物理氣相沉積工藝Physical Vapour Deposition (PVD) Process
立揚 AlOx 阻隔膜採用電子束蒸發（E-Beam Evaporation）工藝，在真空腔體（壓力 10⁻⁴ – 10⁻⁵ mbar）中以高能電子束轟擊 Al₂O₃ 靶材，使其氣化並沉積於 PET 基材表面，形成均勻的陶瓷薄膜。整個鍍膜層厚度僅 20–50 nm（奈米），重量幾乎不增加，卻能提供接近金屬鋁箔的氣體與水蒸氣阻隔性能。 Lihyang AlOx barrier film uses electron-beam evaporation (E-Beam) PVD technology. In a vacuum chamber (10⁻⁴ – 10⁻⁵ mbar), a high-energy electron beam bombards the Al₂O₃ target material, vaporizing it onto the PET base film to form a uniform ceramic layer. The coating is only 20–50 nm thick — negligible weight addition — yet provides gas and water vapour barrier performance approaching metallic aluminium foil.
- 鍍膜腔體：Deposition chamber: 連續收放捲設計，可處理幅寬 500–1600 mm 的 PET 薄膜 Continuous roll-to-roll design, handles PET widths of 500–1600 mm
- 塗層均勻性：Coating uniformity: 厚度變異 ±5 nm，確保全幅阻隔一致性 Thickness variation ±5 nm, ensuring consistent barrier across full width
- 塗層組成：Coating composition: 純 Al₂O₃（三氧化二鋁），無混合金屬，完全非金屬屬性 Pure Al₂O₃ (aluminum oxide), no metallic content — fully non-metallic
- 基材選擇：Base film options: PET 12 µm（標準）、PET 15 µm（強化）、PET 19 µm（重包裝） PET 12 µm (standard), PET 15 µm (reinforced), PET 19 µm (heavy-duty)
為什麼 AlOx 能阻隔氣體？Why Does AlOx Block Gas?
AlOx 薄膜的阻隔機制來自陶瓷層的緻密無孔結構。氧氣（O₂）和水蒸氣（H₂O）分子無法穿透緊密排列的 Al₂O₃ 晶格，必須繞過塗層中的極少量缺陷（Pinhole），大幅延長了氣體擴散路徑。相比之下，未塗佈的 PET 薄膜透氧率約 100–150 cc/m²/day，塗佈後可降至 ≤1.0，阻隔提升超過 100 倍。 The barrier mechanism of AlOx film derives from the dense, pinhole-minimized structure of the ceramic layer. O₂ and H₂O molecules cannot penetrate the tightly packed Al₂O₃ lattice and must circumnavigate the rare defects (pinholes), dramatically extending the gas diffusion path. By comparison, uncoated PET has an OTR of ~100–150 cc/m²/day; after AlOx coating this drops to ≤1.0 — a barrier improvement exceeding 100×.
差異比較：AlOx vs 傳統鋁箔 vs 鍍鋁膜（VMPET） Comparison: AlOx vs Aluminium Foil vs Metallized Film (VMPET)
在選擇阻隔包裝材料時，以下三種材料最常被比較。每種材料各有其適用場景，理解差異有助於選出最符合生產線需求的方案。 When selecting barrier packaging materials, the following three are most commonly compared. Each has its optimal use case — understanding the differences helps select the right solution for your production line.
| 特性Property | 傳統鋁箔Aluminium Foil | 鍍鋁膜（VMPET）Metallized Film (VMPET) | AlOx 透明阻隔膜AlOx Barrier Film |
|---|---|---|---|
| 外觀Appearance | 不透明銀色Opaque silver | 不透明銀色金屬光澤Opaque metallic silver | 透明（透光率 >90%）Transparent (>90% light transmission) |
| 塗層成分Coating Material | 金屬鋁（Al）Metallic Al | 金屬鋁層 ~40 nmMetallic Al ~40 nm | 三氧化二鋁 Al₂O₃，20–50 nmAl₂O₃ ceramic, 20–50 nm |
| 整體厚度Total Thickness | 6–20 µm6–20 µm | PET（12–19 µm）+ 鋁層PET (12–19 µm) + Al layer | PET（12–19 µm）+ AlOx 層PET (12–19 µm) + AlOx layer |
| 透氧率（OTR）OTR (23°C, 0%RH) | ≈0（幾乎完全阻隔）≈0 (near-total barrier) | ≤1.5 cc/m²/day≤1.5 cc/m²/day | ≤1.0 cc/m²/day≤1.0 cc/m²/day |
| 水蒸氣透過率（WVTR）WVTR (38°C, 90%RH) | ≈0≈0 | ≤1.0 g/m²/day≤1.0 g/m²/day | ≤1.0 g/m²/day≤1.0 g/m²/day |
| 金屬探測器Metal Detector | ❌ 無法通過❌ Fails | ❌ 無法通過❌ Fails | ✓ 可通過Passes |
| 微波加熱Microwavable | ❌ 不可❌ No | ❌ 不可❌ No | ✓ 可微波Yes |
| 透明展示內容物Product Visibility | ❌ 不透明❌ Opaque | ❌ 不透明❌ Opaque | ✓ 透明可見Transparent |
| 相對成本Relative Cost | 高（金屬材料）High | 中等Medium | 中高（精密工藝）Med-High (precision) |
| 食品接觸安全Food Contact Safety | ✓ 合規Compliant | ✓ 合規Compliant | ✓ 合規Compliant |
* OTR 及 WVTR 數值依測試條件與塗層厚度有所差異。如需客製化阻隔規格，請聯繫立揚技術工程師。 * OTR and WVTR values vary by test conditions and coating thickness. Contact Lihyang engineers for custom barrier specifications.
應用場景：食品軟包裝・醫藥・電子產品 Application Scenarios: Food · Pharma · Electronics
AlOx 透明阻隔膜的「高阻隔 + 透明 + 金屬探測器相容」三合一特性，使其在以下三個領域具有不可替代的優勢： The three-in-one characteristics of AlOx barrier film — high barrier + transparency + metal detector compatibility — give it irreplaceable advantages in the following three sectors:
食品軟包裝Food Flexible Packaging
咖啡濾掛包、茶葉袋、零食包裝、農業種子袋。透明外觀讓消費者直接看到內容物，同時高阻隔防止氧化與受潮，延長保鮮期。最重要的是：自動化生產線的金屬探測器可正常運作，不需切換材料。 Coffee drip bags, tea bags, snack packaging, agricultural seed bags. Transparent appearance lets consumers see the product, while high barrier prevents oxidation and moisture, extending shelf life. Critically: metal detectors on automated lines operate normally without material substitution.
醫藥包裝Pharmaceutical Packaging
藥片鋁塑泡殼（Blister Pack）、藥粉小袋、醫療器材乾燥劑袋、院內感染防護包裝。AlOx 膜符合歐盟與 FDA 食品/藥品接觸材料法規，高濕熱環境（38°C, 90% RH）下 WVTR ≤1.0，有效保護藥品效期。 Blister packs, medicament sachets, medical device desiccant pouches, infection control packaging. AlOx film complies with EU and FDA food/pharma contact regulations. WVTR ≤1.0 at 38°C/90%RH effectively protects pharmaceutical shelf life.
電子產品防潮Electronics Moisture Protection
電路板保護袋（PCB）、LED 驅動器長途運輸包裝、半導體零組件貯存袋。電子零件對水蒸氣極度敏感，AlOx 膜在長期常溫貯存下維持穩定 WVTR ≤1.0，避免元件在出廠至安裝前受潮氧化。 PCB protective bags, LED driver shipping packaging, semiconductor component storage. Electronic parts are extremely moisture-sensitive; AlOx film maintains stable WVTR ≤1.0 during long-term ambient storage, preventing oxidation before installation.
加工建議：AlOx 膜的操作注意事項Processing Notes for AlOx Film
- 表面保護：Surface protection: AlOx 塗層極薄（20–50 nm），收放捲時需確保膠輥清潔，避免刮傷導致阻隔性下降 AlOx coating is extremely thin (20–50 nm); keep rollers clean during winding to avoid scratches that degrade barrier
- 膠水選擇：Adhesive selection: 建議搭配專用雙組份聚氨酯（PU）黏著劑，避免膠水成分與氧化鋁層反應導致分層 Use dedicated two-component polyurethane (PU) adhesive; avoid adhesives that may react with the oxide layer causing delamination
- 貯存條件：Storage conditions: 建議在溫度 10–30°C、濕度 30–70% RH 的環境貯存，避免直射陽光 Store at 10–30°C, 30–70% RH, away from direct sunlight
- 複合結構：Laminate structure: AlOx 面可與 CPP、LLDPE 等熱封層複合，建構完整阻隔複合膜；AlOx 塗層面建議朝內（夾於兩層結構之間）以獲最佳保護 AlOx surface can be laminated with CPP, LLDPE sealant layers for complete barrier structures; AlOx coating face recommended inward (sandwiched) for optimal protection
立揚 AlOx 阻隔膜技術規格表 Lihyang AlOx Barrier Film — Technical Specifications
標準品規格Standard Product Specifications
| 參數Parameter | 標準版Standard | 高阻隔版High-Barrier | 測試標準Test Method |
|---|---|---|---|
| 塗層材質Coating Material | Al₂O₃（三氧化二鋁） | — | |
| 塗層厚度Coating Thickness | 30–40 nm | 45–50 nm | TEM / SEM |
| 基材Base Film | PET 12 / 15 / 19 µm | — | |
| 透光率Light Transmission | >90% | ASTM D1003 | |
| 透氧率（OTR）Oxygen Transmission Rate | ≤1.0 cc/m²/day | ≤0.5 cc/m²/day | ASTM D3985 (23°C, 0% RH) |
| 水蒸氣透過率（WVTR）Water Vapour Transmission Rate | ≤1.0 g/m²/day | ≤0.5 g/m²/day | ASTM F1249 (38°C, 90% RH) |
| 拉伸強度（MD/TD）Tensile Strength (MD/TD) | ≥150 / ≥200 MPa | ASTM D882 | |
| 延伸率（MD/TD）Elongation at Break | ≥100 / ≥80% | ASTM D882 | |
| 金屬探測器相容Metal Detector Compatible | 是 ✓ | — | |
| 可微波加熱Microwavable | 是 ✓ | — | |
| 可用寬度Available Width | 500–1600 mm | — | |
| 最大卷長Max Roll Length | 5,000–10,000 m | — | |
| MOQ（最低訂購量）Minimum Order Quantity | 1 roll（現貨規格） | — | |
* 以上規格為標準品參考值，實際數值依訂製規格與批次測試報告為準。如需客製化阻隔規格、複合膜結構或印刷版本，請聯繫立揚業務工程師。 * Above specifications are reference values for standard products. Actual values per custom spec and batch test reports. For custom barrier specs, laminate structures, or printed versions, contact Lihyang's application engineers.
常見問題 FAQ Frequently Asked Questions
AlOx 透明阻隔膜是在 PET 基材上以 PVD 工藝鍍製 20–50 nm 的三氧化二鋁（Al₂O₃）陶瓷層。由於 Al₂O₃ 是陶瓷氧化物而非金屬鋁，膜材呈現高透明度（>90%）、可通過金屬探測器、可微波加熱。相比之下，鍍鋁膜（VMPET）含金屬鋁層，外觀不透明銀色，無法通過金屬探測器。兩者阻隔性能相近，但 AlOx 在透明度和加工相容性上有明顯優勢。 AlOx barrier film uses PVD technology to deposit a 20–50 nm aluminum oxide (Al₂O₃) ceramic layer on PET substrate. Since Al₂O₃ is a ceramic oxide rather than metallic aluminium, the film is highly transparent (>90%), passes metal detectors, and is microwavable. By contrast, metallized film (VMPET) contains metallic aluminium — opaque silver in appearance and incompatible with metal detectors. Both offer similar barrier performance, but AlOx has clear advantages in transparency and processing compatibility.
立揚 AlOx 標準品：OTR ≤1.0 cc/m²/day（ASTM D3985，23°C, 0% RH）；WVTR ≤1.0 g/m²/day（ASTM F1249，38°C, 90% RH）。高阻隔強化版可達 OTR ≤0.5、WVTR ≤0.5。相較未塗佈 PET（OTR ~120 cc/m²/day），阻隔提升超過 100 倍。如需完整 TDS 技術資料表或特定阻隔規格，請來信 tw@lihyangfoil.com。 Lihyang standard AlOx: OTR ≤1.0 cc/m²/day (ASTM D3985, 23°C/0%RH); WVTR ≤1.0 g/m²/day (ASTM F1249, 38°C/90%RH). High-barrier versions achieve OTR ≤0.5, WVTR ≤0.5. Compared to uncoated PET (OTR ~120 cc/m²/day), barrier improvement exceeds 100×. For full TDS datasheets or custom specs, email tw@lihyangfoil.com.
可以。金屬探測器偵測的是導電金屬材料，而 AlOx 塗層的成分是三氧化二鋁（Al₂O₃）——一種不導電的陶瓷氧化物，不含游離態金屬鋁，因此不會觸發金屬探測器感應。這使 AlOx 膜可以在配備金屬異物篩選系統的全自動食品包裝線上無縫使用，無需另行設置旁路或更換材料。 Yes. Metal detectors detect electrically conductive metallic materials. AlOx coating is aluminum oxide (Al₂O₃) — a non-conductive ceramic oxide containing no free metallic aluminium — so it does not trigger metal detector sensors. This allows AlOx film to be used seamlessly on fully automated food packaging lines equipped with metal foreign-object screening, without bypasses or material substitutions.
AlOx 膜可與多種熱封材料複合：CPP（流延聚丙烯，常見食品包裝）、LLDPE（線性低密度聚乙烯，耐衝擊）、BOPP（雙向延伸聚丙烯，透明高光）。複合建議：使用雙組份 PU 膠水（聚氨酯），避免酸性膠水與氧化鋁層反應。AlOx 鍍層面建議夾在結構中間（如 PET-AlOx / 膠 / CPP），以避免塗層在後處理中受到物理磨損。如需複合結構設計建議，請聯繫立揚技術工程師。 AlOx film can be laminated with: CPP (cast polypropylene, common food packaging), LLDPE (linear low-density PE, impact resistant), BOPP (biaxially oriented PP, clear high-gloss). Lamination guidance: use two-component PU adhesive; avoid acidic adhesives that may react with the oxide layer. The AlOx coated face should ideally be sandwiched in the structure (e.g. PET-AlOx / adhesive / CPP) to protect the coating from abrasion during downstream processing. Contact Lihyang engineers for laminate structure design advice.
免費樣品申請方式：①透過網站詢價表單填寫應用場景與規格需求；②直接來信 tw@lihyangfoil.com，說明最終應用（食品/醫藥/電子）、所需幅寬（mm）與預估年用量。
MOQ：標準品 1 卷（約 5,000–10,000 m，依幅寬）；小量樣品可協調。交期：現貨規格 3–5 個工作天；客製幅寬或特殊阻隔規格 15–20 個工作天。
To request free samples: ① Fill the website inquiry form with your application and spec requirements; ② Email tw@lihyangfoil.com with your end application (food/pharma/electronics), required width (mm), and estimated annual volume.
MOQ: Standard products: 1 roll (~5,000–10,000 m depending on width); small samples can be arranged. Lead time: In-stock specs: 3–5 business days; custom width or special barrier specs: 15–20 business days.
索取免費樣品・技術支援 Request Free Samples · Technical Support
立揚箔業科技提供 AlOx 透明阻隔膜免費技術樣品、TDS 資料表與工程師諮詢。告知應用場景，我們提供最適規格建議。 Lihyang Foil Technology provides free technical samples of AlOx barrier film, TDS datasheets, and engineer consultation. Share your application and we'll recommend the optimal specification.
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